MORE than thirty-three years have elapsed since I first entertained doubts as to the truth of the prevailing theory of political economy, and endeavoured to investigate (what appeared to me) its errors and their fundamental causes. My avocation (as Professor) gave me the motive to undertake that task--the opposition which it was my fate to meet with forcibly impelled me to pursue it further.

My German contemporaries will remember to what a low ebb the well-being of Germany had sunk in 1818. I prepared myself by studying works on political economy. I made myself as fully acquainted as others with what had been thought and written on that subject. But I was not satisfied with teaching young men that science in its present form; I desired also to teach them by what economical policy the welfare, the culture, and the power of Germany might be promoted. The popular theory inculcated the principle of freedom of trade. That principle appeared to me to be accordant with common sense, and also to be proved by experience, when I considered the results of the abolition of the internal provincial tariffs in France, and of the union of the three kingdoms under one Government in Great Britain. But the wonderfully favourable effects of Napoleon's Continental system, and the destructive results of its abolition, were events too recent for me to overlook; they seemed to me to be directly contradictory of what I previously observed. And in endeavouring to ascertain on what that contradiction was founded, the idea struck me that the theory was quite true, but only so in case all nations would reciprocally follow the principles of free trade, just as those provinces had done. This led me to consider the nature of nationality. I perceived that the popular theory took no account of nations, but simply of the entire human race on the one hand, or of single individuals on the other. I saw clearly that free competition between two nations which are highly civilised can only be mutually beneficial in case both of them are in a nearly equal position of industrial development, and that any nation which owing to misfortunes is behind others in industry, commerce, and navigation, while she nevertheless possesses the mental and material means for developing those acquisitions, must first of all strengthen her own individual powers, in order to fit herself to enter into free competition with more advanced nations. In a word, I perceived the distinction between cosmopolitical and political economy. I felt that Germany must abolish her internal tariffs, and by the adoption of a common uniform commercial policy towards foreigners, strive to attain to the same degree of commercial and industrial development to which other nations have attained by means of their commercial policy. [From the Preface to the First Edition]

The cuneiform inscription in the Liberty Fund logo is the earliest-known written appearance of the word "freedom" (amagi), or "liberty." It is taken from a clay document written about 2300 B.C. in the Sumerian city-state of Lagash.